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AutoTune™ User Guide

6.7. Noise Squelch Threshold

This is a test only; there is no alignment.

RF Control

Port

Frequency

Modulation

Level

Generate

RF IN/OUT

Test Freq

FM, 1 kHz @ 3kHz deviation

-50 dBm

Table 6-17. Analyzer Configuration for Noise Squelch Threshold test

6.7.1. Alignment

No alignment is needed.

6.7.2. Test

The purpose of this procedure is to verify that the squelch circuit operation performs as

expected, blocking noise but allowing stronger signals to be heard. The analyzer is

setup as specified in this section’s Analyzer Configuration table. The radio is placed into

Test Mode at the lowest RX Test Frequency. The radio audio output level is tested and

if insufficient to measure the unsquelched condition the volume is increased. Beginning

at -125 dBm, the analyzer output level is slowly increased until the radio unsquelches

OR is 6 dBm above the Max Limit, whichever comes first. The analyzer output level is

compared against test limits and the final results written to the log file. The radio audio

output level is tested and the volume is increased if insufficient to measure unsquelch

condition. Beginning at -125 dBm, the analyzer output level is slowly increased until the

radio unsquelches OR 6 dBm above the Max Limit, whichever comes first. The

unsquelch output level is compared against test limits and the final results written to the

log file.

Name

Description

Result

Pass or Fail. Noise Squelch Threshold level within Max Limit

Frequency

Test Frequency

Unsquelch

Analyzer output level at which the radio unsquelches

Max Limit

Maximum Limit (exclusive) for Noise Squelch Threshold to Pass

Table 6-18. Noise Squelch Threshold test results

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 45 46

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